US8362722B2 - Power converter device - Google Patents

Power converter device Download PDF

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Publication number
US8362722B2
US8362722B2 US12/938,494 US93849410A US8362722B2 US 8362722 B2 US8362722 B2 US 8362722B2 US 93849410 A US93849410 A US 93849410A US 8362722 B2 US8362722 B2 US 8362722B2
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United States
Prior art keywords
braking
current
synchronous motor
permanent magnet
magnet synchronous
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US12/938,494
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US20110227513A1 (en
Inventor
Yusaku ONUMA
Yusuke Arao
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Hitachi Industrial Equipment Systems Co Ltd
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Hitachi Industrial Equipment Systems Co Ltd
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Assigned to HITACHI INDUSTRIAL EQUIPMENT SYSTEMS CO., LTD. reassignment HITACHI INDUSTRIAL EQUIPMENT SYSTEMS CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ARAO, YUSUKE, Onuma, Yusaku
Publication of US20110227513A1 publication Critical patent/US20110227513A1/en
Priority to US13/742,704 priority Critical patent/US8581531B2/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
    • H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
    • H02P3/18—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing an ac motor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
    • H02P25/022—Synchronous motors
    • H02P25/024—Synchronous motors controlled by supply frequency
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
    • H02P27/08—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
    • H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
    • H02P3/18—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing an ac motor
    • H02P3/24—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing an ac motor by applying dc to the motor

Definitions

  • the present invention relates to a power converter device.
  • a direction current braking (or DC braking) of turning ON, either one (1) phase or two (2) phases on a positive (+) electrode side (s) of a switching circuit, with a negative side of other phase, continuously, so as to run direct current through that motor, thereby achieving the braking thereof.
  • Patent Document 1 there is also already known a method of turning ON either one (1) phase on the negative electrode side of the switching circuit, while brining the positive electrode side of the remaining other phases into a PWM operation; thereby conducting the DC braking.
  • Patent Document 1 a method of decelerating the motor through reversed phase braking, when it is rotating at the high speed, so as to detect that the rotation speed reaches to a certain speed of a low rotation speed, and thereby switching it into the DC braking.
  • Patent Document 1 Japanese Patent Laying-Open No. 2002-374689 (2002).
  • the braking force is in shortage, in particular, when it is rotating at the low speed, and then it takes a long time until when it is decelerated down to a desired speed and the stoppage thereof. Also, when it is rotating at the high speed, the excessive current is generated, and this results into demagnetization and burning of that motor, or breakage of the switching element(s) of the power converter device. And also, if the power converter is provided with the protection with using the over-current, the output is cut off because of that protection, and that the permanent magnet synchronous motor is brought into the free-run condition; i.e., there is a problem that it is impossible to execute the DC braking with stability.
  • an object according to the present invention for dissolving such the problems as mentioned above, is to provide a stopping method for enabling a motor to obtain a stable braking power even when rotating at a high speed, and also to obtain a large braking power even when rotating at a low speed, without necessity of a rotation speed detecting means of the motor or an external braking, as well as, to output a desired stopping torque after stoppage thereof.
  • a power converter device comprising: a switching circuit, which is configured to convert DC to AC; a PWM controller means, which is configured to control ON or OFF of said switching circuit; a means, which is configured to detect or estimate current flowing through a permanent magnet synchronous motor; and a means, which is configured to execute DC braking of said permanent magnet synchronous motor, wherein there are provided a DC braking maximum current setup value, which is determined from an outside or is determined in advance within an inside, and a PWM all-phases cutoff function and a zero vector output function within said PWM controller means, within said PWM controller means, whereby the PWM all-phases cutoff and the zero vector output are repeated within said PWM controller means, if a current value, which is obtained by said means for detecting or estimating the current, exceeds said DC braking maximum current setup value, when running DC current to the permanent magnet synchronous motor, so as to execute DC braking for obtaining a
  • a power converter device for driving a permanent magnet synchronous motor i.e., enabling to obtain a stable braking power even when it is rotating at a high speed, and/or a large braking power even when it is rotating at a low speed, without necessity of a rotation speed detecting means of the motor or an external brake, as well as, outputting a desired stopping torque even after stoppage thereof.
  • FIG. 1 is a view for showing the structures of a power converter device, according to an embodiment 1 of the present invention
  • FIG. 2 is a view for showing an example of waveforms of rotation speed and current when executing the DC braking
  • FIG. 3 is a view for showing waveforms of signals, for explaining the operations of the power converter device according to the embodiment 1.
  • FIG. 1 is a block circuit diagram for showing an embodiment according to the present invention.
  • AC voltage generating from a AC power source 1 is rectified within a rectifier circuit 2 , and it is smoothed by a smoothing circuit 3 .
  • DC current smoothed is converted to AC voltage through a switching circuit 4 , thereby to be applied to a permanent magnet synchronous motor 9 .
  • a PWM controller means 5 controls ON and OFF of the switching circuit 4 , so that random voltage can be applied to the permanent magnet synchronous motor 9 .
  • a current detector means 6 detects phase current running through the permanent magnet synchronous motor 9 .
  • a shunt resistor may be provided on a negative electrode side of the smoothing circuit 3 , so as to estimate the phase current from the current flowing through this shunt resistor.
  • a fan 10 is attached onto a shaft of the permanent magnet synchronous motor 9 .
  • FIG. 2 shows an example of waveforms of rotation number and current when the DC braking is taken place.
  • FIG. 3 is a view for showing waveforms of signals, for explaining the operations of the present invention.
  • a peak value of the current is calculated by a peak-value calculator means 7 .
  • This peak value is compared with a DC braking maximum current setup value, which is determined from an outside or is determined in advance within the power converter device, by means of a current comparator means 8 , and if the peak value of the current exceeds the DC braking maximum current setup value, an instruction of cutting off all phases of PWM (being called “PWM all-phases cutoff instruction”) is inputted into the PWM controller means 5 .
  • PWM all-phases cutoff instruction an instruction of cutting off all phases of PWM
  • the PWM controller means 5 upon receipt of the PWM all-phase cutoff instruction controls the switching circuit 4 , in such a manner that it repeats the following outputs; i.e., a PWM all-phases cutoff output, for compulsively turning all phases of the switching circuit 4 OFF, and a zero vector output, for turning all phases of the positive electrode side or of the negative electrode side ON while turning all phases of remaining other electrode side OFF, at an appropriate frequency.
  • the peak value of current which is calculated from the current detected by the current detector means 6 within the peak-value calculator means 7 , is compared with a DC braking return current setup value, which is determined from an outside or is determined in advance within the power converter device, by means of a current comparator means 8 , and if the peak value of current is equal to or less than the DC braking return current setup value, a DC braking return instruction is inputted into the PWM controller means 5 .
  • the PWM controller means 5 when the DC braking return instruction is inputted therein, controls the switching circuit 4 so as to repeat the DC braking, again.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Stopping Of Electric Motors (AREA)
  • Control Of Ac Motors In General (AREA)
US12/938,494 2009-11-04 2010-11-03 Power converter device Active 2031-07-22 US8362722B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US13/742,704 US8581531B2 (en) 2009-11-04 2013-01-16 Power converter device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009252573A JP5372705B2 (ja) 2009-11-04 2009-11-04 電力変換装置
JP2009-252573 2009-11-04

Related Child Applications (1)

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US13/742,704 Continuation US8581531B2 (en) 2009-11-04 2013-01-16 Power converter device

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US20110227513A1 US20110227513A1 (en) 2011-09-22
US8362722B2 true US8362722B2 (en) 2013-01-29

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US12/938,494 Active 2031-07-22 US8362722B2 (en) 2009-11-04 2010-11-03 Power converter device
US13/742,704 Active US8581531B2 (en) 2009-11-04 2013-01-16 Power converter device

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Country Status (6)

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US (2) US8362722B2 (ja)
EP (1) EP2320556B1 (ja)
JP (1) JP5372705B2 (ja)
KR (2) KR101277812B1 (ja)
CN (2) CN102055394B (ja)
TW (1) TWI425759B (ja)

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FR2976326A1 (fr) * 2011-06-09 2012-12-14 Okwind Sas Module de freinage pour dispositif de captage d'energie eolien/hydrolien, procede de freinage, installation de production d'energie, support d'enregistrement et programme d'ordinateur correspondants
JP5908273B2 (ja) * 2011-12-21 2016-04-26 シャープ株式会社 同期モータ駆動装置
JP2013240195A (ja) * 2012-05-15 2013-11-28 Mitsubishi Electric Corp 加減速制御装置
CN103633895B (zh) * 2012-08-28 2017-04-12 珠海松下马达有限公司 交流伺服驱动器及其相关方法
JP2014057391A (ja) * 2012-09-11 2014-03-27 Juki Corp モータ制御装置及びモータ制御装置の制御方法
JP6353925B2 (ja) * 2014-11-07 2018-07-04 株式会社日立産機システム 電力変換装置および電力変換装置の制御方法
JP6203784B2 (ja) * 2015-06-11 2017-09-27 ファナック株式会社 同期電動機の制御装置
WO2017013722A1 (ja) * 2015-07-17 2017-01-26 株式会社日立産機システム 遮断制御方法、及びそれを用いた電力変換装置
CN106470001B (zh) * 2015-08-21 2019-06-28 株式会社安川电机 一种变频器和电机控制系统
JP6719952B2 (ja) * 2016-04-18 2020-07-08 株式会社マキタ 電動作業機
EP3477834A4 (en) * 2016-06-22 2020-02-12 Hitachi Industrial Equipment Systems Co., Ltd. POWER CONVERSION DEVICE
CN106655921A (zh) 2016-11-18 2017-05-10 深圳市道通智能航空技术有限公司 一种永磁同步电机制动方法及相关设备
US10501293B2 (en) 2017-01-31 2019-12-10 Goodrich Aerospace Services Private Limited Method of applying brake to a hoist by electromagnetic means in a permanent magnet motor
CN108322108A (zh) * 2018-01-11 2018-07-24 株洲麦格米特电气有限责任公司 无刷电机的制动电路、制动方法、制动装置及无刷电机
JP6982511B2 (ja) * 2018-01-30 2021-12-17 サンデン・オートモーティブコンポーネント株式会社 電動圧縮機
US11506195B2 (en) * 2018-03-21 2022-11-22 Magnetic Pumping Solutions Method and system for controlling downhole pumping systems
CN111076344B (zh) * 2019-12-09 2020-11-24 珠海格力电器股份有限公司 自动调节风机降频速率的控制方法、系统及存储介质
US11334103B2 (en) * 2020-08-18 2022-05-17 Google Llc Programmable system TDP with ASIC power capping

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Also Published As

Publication number Publication date
TW201136131A (en) 2011-10-16
US20130127380A1 (en) 2013-05-23
CN102055394A (zh) 2011-05-11
JP2011101446A (ja) 2011-05-19
EP2320556B1 (en) 2018-09-05
EP2320556A2 (en) 2011-05-11
KR101277812B1 (ko) 2013-06-21
EP2320556A3 (en) 2015-02-18
TWI425759B (zh) 2014-02-01
KR20110049711A (ko) 2011-05-12
KR101445023B1 (ko) 2014-09-26
JP5372705B2 (ja) 2013-12-18
US8581531B2 (en) 2013-11-12
CN103546072A (zh) 2014-01-29
KR20130025921A (ko) 2013-03-12
US20110227513A1 (en) 2011-09-22
CN102055394B (zh) 2013-11-06

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